Apparatus for pickling coils



C- G. WATSON APPARATUS FOR PICKLING COILS Aug. 26, 1952 3 Sheets-Sheet 1Filed March 24, 1948 INVENTOR BY RLES G h ATsolv A-rronnzvs llLlillll Il lLllllll Aug. 26, 1952 c. G. WATSON APPARATUS FOR PICKLING cons 3Sheets-Sheet 2 Filed March 24, 1948 INVENTOR. CHARLES G WATSON 1952 c.G. WATSON 2,608,197

APPARATUS FOR PICKLJNG COILS Filed March-24, 1948 3 Sheets-Sheet 5 IN VEN TOR.

CHARLES G WATSON ATTORNEYS Patented Aug. 26, 1952 APPARATUS FOR PICKLINGCOILS Charles G. Watson, Youngstown, hio, assignor' to The YoungstownWelding & Engineering Company, Youngstown, Ohio, a corporation of Ohio IApplication March 24, 1948, Serial No. 16,838

3 Claims.

This invention relates to an apparatus for' pickling loosely coiledmetallic material such as strip steel, wire or the like.

'In the course of manufacture of strip steel, or other relatively longmetallic material, the material can be coiled in relatively open orloose flat spiral configurations; or in the case of strip steel, it canbe coiled tight and back spun to open up the coil loops. It is, however,difficult to remove grease, scale or other deleterious substances fromsuch material when in coiled form and, in particular, it is verydifficult to properly pickle strip steel, or the like when thus coiled.This is due primarily to the fact that conventional pickling methods andapparatuses do not provide sufflcient movement of the convolutions ofthe coils relative to each other so that the scale or other substancesthereon is not properly loosened and the pickling solution does notproperly penetrate between the convolutions. Moreover, conventionalprocedures and apparatuses do not cause sufficient bodily movement ofthe coils in the pickling solution with'the result that a considerableportion of the scale or other deleterious substances which is loosenedis still retained within the convolutions. I

An object of the invention is to provide a novel and improved apparatusfor treating,- for example, pickling, loosely coiled metallic material,wherein the coil is immersed in a treating solution and repeatedlyraised and lowered therein and rotated while immersed.

Another object of the invention'is to provide a novel and improvedapparatus for treating loosely coiled metallic material such as stripsteel, wire or the like, which comprises repeatedly varying the radialseparation between different portions of the convolutions of the coilwhile immersed in a treating solution and also partially rotatingthecoil while so immersed.

A further object of the invention is to provide a novel and improvedapparatus for pickling loosely coiled strip steel, wire or the like,wherein the coil is repeatedly raised and lowered and the weight of thecoil utilized to assist in effecting repeated variations in the radialseparation between different portions of the convolutions of thecoilwhile immersed in a picklingsolution and also in partially bodilyrotating the coil and/or circumferentially displacing the convolutionsrelative to each other while the coil is immersed and in alternationwith the variations in the radial separation of the convolutions.

The invention further, resides in certain novel features of constructionand combination, and.

2 arrangement of parts of an apparatus, and fur ther objects andadvantages thereof will be ap parent to those skilled in the art towhich it'pertains from the following description of the presentpreferred embodiment described with refer-'- ence to the accompanyingdrawings in which similar reference characters designate correspondingparts in the several views and in which:

Fig. 1 is a top plan view of a novel apparatus constructed in accordancewith this invention;

Fig. 2 is a longitudinal sectional view taken substantially on thesection line 22'of Fig. 1; Fig. 3 is a transverse sectional view takenon the section-line 33 of Fig. 1 and showingone of the coils to betreated in its uppermost position within the pickling tank;

Fig. 4 is a sectional view similar to Fig. 3 but showing the coil ofmaterial being treated in its lowermost position in the tank;

' Fig. 5 is a sectional view taken substantially on the section line 5-5of Fig. 1; and

Fig. 6 is a schematic iring diagram of a suitable electric circuit forcontrolling operation of the motor for the apparatus.

The apparatus of this invention is capable of being used to subjectloosely coiled metallic material, such as strip steel or the like, totreatment by a variety of different solutions. For the sake ofconciseness and definiteness, however; the novel apparatus ishereinafter specifically described as used to pickle loose spiral coilsof strip metal. This restriction of the description is, however, onlyfor the purpose of illustrating one practical embodiment and is not tobe considered as limiting the invention to such a use. i

As shown in the drawings, the present preferred apparatus comprises apickling tank generally designated l0 which may be formed ofany suitablematerial and is adapted to contain a pick}- ling solution. Adjacent oneside of the tank are spaced stands or pillars II and i2 which may beformed separately from the tank or as integral projections therefrom.Upon the top surface of the pillar l I are mounted a pairof bearingbrack ets or supports [3 and 14 in parallel spacedrelationship. Acorresponding pair of bearing supports or brackets l5 and I6 are mountedin par; allel spaced relationship upon the top of the 'pil lar or standl2. Each of the bearing supports or brackets l3, [4, I5 and I6 isprovided with a substantially semi-circular bearing surface adjacent itsupper forward end in which a shaft I1 is rotatably or rockablysupported, which shaft is held from displacement relative to thebrackets by bearing cap members [8, I9, 20 and 2| secured 3 to thebearing brackets l3, l4, l5 and [6, respectively, by suitable bolts suchas 22.

The shaft I! is provided with an arm 23, one end of which is fixedlyconnected to the shaft l1 intermediate the bearing brackets l3 and 14. Asecond arm 24 similar to the arm 23 is fixedly secured to thezshaft, I l'intermediateithe:bearing brackets--l5 -and [6. The arms 23 and 24 rockwith the shaft 11, extend therefrom in substantial alignment forwardlyover the tank I0, and. are provided adjacent their forwardenda with.

semi-circular recesses for removably receiving a bar 25 forming a partof asupportingmeansfor.

the coils C which are to beatreeted; Itisztc understood that one or morecoils may be simultaneously treated depending upon the construction ofthe apparatus and thewidth of thecoiled material. The bar 25 may besubstantially circular in cross section, as shown, or may simply havecylindrical bearing surfaces formed thereon for cooperation with,the-semi-circularz recesses in the arms; .23'.and 24. Depending fromthe-lower seaace of.- the 2,5 is a: hook-like. member.- 28 adaptedto-be-insertedthrough. the central, openthe coil or coils C to betreatedsc. that the latter belifted andsupported by the hook with.their: axes, extending substantially horizontally and parallel withthelength oftheatank.

The hook 26.:may be. constructed in any;v suitablermanner but isphereshown as aplatehaving reeutorci-ng flangev membersalong the edgesthereof}. the: hook; preierably being; made of inert to thetreatingsolution. The. bar litiSzfiIflihfiI provided 3 with suitable."means. such azioop members; 2i! and for receiving cables or the like bywhichtherbar, and hencethe coils supported thereon. mayv *beliftcd; fromthe, tank and: transported. to any "desired: position. by: a crane orthe like. i previously mentioned; the shaft I1.- and hence the armssnand 2.4 are repeatedlyrocked moppositedirections. This-may be: effectedby unsuitable means... As illustrated in the drawings, the shaft isrocked-bye reversible electric motor-swcennec ed t0. the; input. shafit;3a: of a scar -muetion unit 31;, the-output. shaft 3.2. ofwhichrisconnected with theshaft 'l;'l., Thegear regimetionrunit 3|.providesua. large reduction or that the shaft 32 zmoves at a relativelyslowspeed and; isprovidedwtth-a. means, generally: designated 34; i'or-vautomatically effecting res vel'saln l the motor 28 'when1 theshafts-:SZ-andil have been rotated-1through-.a,. preselected portion L3revolution so. that the arms. 213: and J are rocked through an arc otvpreselectcdnsizer;

shown .in Fig; theI mechanism.34:- compn'seaapair of electricalswitches35 am}, 36-01 commercial construction .mountedfor sequentialactuation-by asector-shaped actuator; generally designated 31-, whichisconnected to theshaft 32.. Breterably, the sector-shaped actuator "3.1is adiustable so. that the limitsiandextent of arouatezmovement of: theshaft,32-, and'henceof the arms, 23,.and, 24, be adjusted. In theillustratedembodimentthis is; achieved; by having; the actuator;- 31,formed, of. two sector-shaped'mem bers 38 and- IiQ-eachadfiustably fixeto; the shaft by set. screws, In, addition, they-members, may heprovided withv cooperating; arcuate; slots, tor thereceptionofjaconnectingbolt 40. Thermemhers and; 35- may; be, angularlyaddustedrelativeto each, other and/or the shaft. 32 to vary the; ex entand/or limits, of; the. angular movementoi shaft 32,, which inturn.determines the elmntzofi andathe limitsto whichthe armszi'and 4 24 arerocked. Further adjustment of the angular movement of the shaft 32 maybe effected by adjusting the bracket members H and 42, upon which theswitch members 35 and 38 are mounted, relative to the housing of theunit 34.

For this purpose the switch mounting brackets are," provided: withslots-'j'thl'o h which the mounting screws-43, 40; respectiveiyipass.The switches 35 and 36 are provided with pivoted actnating arms and 46,respectively, adapted to becontacted alternately by the sector-shapedactuator 3Tto momentarily close their normally opencontacta.

'Ilhezelectric:motor 29 shown is of the threephase, alternating current,reversible type and the energization thereof for rotation in oppositedirectionis-under the control of the switches 35 and 36. This iseifected by connecting a source of three-phase electrical power,represented by the wires Ll, L2 and L3, to one set of contacts of. acircuit breaker the other contacts.- 01' which are respectivelyconnected with.v wires. v H, 48 and 49 on the machine side.ofithecircuit. Thewire connectible tow onedeadofthe motor 29; eitherthrough the normally open contact. Slanof airelay 52=and a wire "a, orthrough a-wire-Hb and thernormall-y open. contact 58 of. a relayThe-wire. wisxconnectible with a second-lead 5-l orthe motor through anormally open contact 52b-cftherelay 52. The wire/43 15 connectiblewith-the third lead-53. of the motor 2 fl through the normally opencontact 520 of relay 52: One endof arwire- 54- is-connected withthe-wire at a point.- between thecircuit breaker 5aarmtthe contactlathe-other.- end' of this wire being, connectible with one-. end 0!wire: 55 through thenormally open contact. 5 6b of 1 the; 1'9? lay 56,the1other end ofthe wire 55 beingsconnected. with theme-tor. lead- 53..A wire-511sconnectedat oneendwiththewire-AS betweencin cu-i-tbreaker;ill-and the: contact 520, the other endof this'wireiilzbeingconnectibletothe motor lead 51 throughthe normally open contact 551: of relayShanda-wire 58. Consequently, when the-circuit breaker: 50 is :closedand the relay 52 is energized while relay 56 is deenerg-ized, the motoris energized .for rotation. in one direction timoug-hthe-leads H, 51 and53 and the now. closed- .contactsg52a', 52b and: 520. Whenrela-yy52 isdeenergizednand relay 56 is energized; thev motor; is; their energized;.for. rotation in the reverse direction since the; contacts 52a, 52band 52.01am novwopemand'the: contacts 56a, Siband 5.61: are closedzwiththe. result: that the motor leads 5l1arnd531'are, in'eflect', reversedby the now-closed-contactsfifib and 56c. The energizetioir ofizthezrelays52 and 58 are under control of. the-,switchesrfl andrai,respectively, so that the-.motonl! rotatesv in onev direction until theactuator 31 operatesone of these switches at which; time. the? motor is.reversed and operates imthe-areyerse; direction until the actuatorengageszthe; otherof; the switches. This reversing actiorrcontinuesaszlong'as' the; apparatus is in operation.

In; order that. the motorcircuit will remain closedafter the actuator3:1 has; moved from an gagement with: the-operatingarm of once! theswitches. 35, 36 and until the said actuator engagesz'the; operating armof the other'of' these switches; the relays:i52:and 56-?are eachprovided withaddition'alcontacts for controlling holding circuits forthe'rel'ays. Thus-relay 52 is provided with. a normally open: contact52d, adapted to engage. and; bridge stationary contacts 59 i and- '60,

andthisrelay also has a normally closed contact.

- therefore provided for the coil of relay56,-this is connectedwith awire I2 which interconnects the contacts 60 and 63 and, inaddition, thewire Til-is connected to-oneterminalH-i of the-"coil ofa relay 14. Theother terminal of relay 14 is connected to: the wire 41' bya wire l 5',the latter also being connected to one terminal [6 ofjthe coil of relay52-and to the corresponding terminal Ofthe coil" of relay 58 by means ofawire H. Theotherterminal '78- oi the coil of relay 56 is connected tothe contact 56 by a wire 19 while the s econd-terminal 88 of the coil ofrelay 52 is connected to the contact 64 by a wire 8|. The

relay [4 is provided with two normally open contacts Ma'andl4b'adapted-to respectively engage and bridge stationary'contacts 82;'83 and 84, 85.

The contactsBZ- and 84 are connected together and to the wire 68 bymeans of a wire 8B.- The contact 83 is connected to'the previouslymentioned wire'ill while the contact 85 is connected with-awire 8"!whichis in turn connected to the stationary contacts 59, til-and tothestationary contact of switch 35. The movable contact of switchisconnected to the wirelfl. which is, in turn connected with theterminal l8 of the coil of relay 56. -The movable contact 'of' switch 36is connected with the wire 8], l the stationary con:- tact ofthis switchbeing connectedwith the wire 8! and hence with the terminal 8ll'of thecoil of 'elay'52. -w'I'he contacts 62 and 65'are interconnecte'd byawire88. V

The circuit just described issuch that, when the circuit breaker fifl isclosed; the motor 29 is placed in operation by momenarily depressing thestart button H. This closes a circuit through the coil of relay 14energizing the latter and thereby closing the normally open contacts 14aand 1412.

A holding'circuit for relay "I4 is thus provided by the now closedcontact 14a so that the relay [4 is held energized until the stop button69 is actum V The momentary closing of start switch H also provides anenergizing circuit for the coil of relay 52, through stop switch 69,start'switch ll,wires 10, 12 andthe normally closed contact 56d. Consequently, relay 52 now closes its normally open contacts 52a, 52b, 52cand 52d and opens its normally closed contact 526. Closing of thecontact 52d provides a holding circuit for the relay 52* through the nowclosedcontacts 14b, contact 520'. and contact 56d. At the same time themove ment of the contact 52c to open position prevents energization ofthe relay. Closing of the contacts 52a, 52b and52c energizes the'motor29 for rotation in one direction with consequent rocking of the arms23,24.

Rotation of the motor and movement of the arms 23 and 24 continue inthis direction until the'actuator .31' engages the arm of switch :35'moving the arm 45 to circuit closing position.

When this occurs a circuit is completed ener-' gizing the relay 56sothat the contacts 56a, b, 56c and 56e of the latter are moved toclosed positions and contact SM is moved to open posi-- tion. Opening ofth circuit-at'SBd deenergizes relay 52- so that'its contacts 52a, 521),520 and 52d move to open-positions while its contact 52c moves to"circuit closing position. A holding circuitis circuit extending throughthe now closed contacts 52c and 56a. Openingo-f the contacts 52a, 52band 520 has deenergized the motor 29 thu 'termtnating its rotation andthat of thearms 23, 24 in one-direction and substantially simultaneouslytherewiththe contactsEBa', 56b and 560 havemoved to circuit closingpositions thereby energizingmotor 29 to rotate th latter and hence rockthe arms 23, 24 in the opposite direction.

Rotation of the motor and movement of the arms in 'this reversedirectioncontinue until the actuator 31 engages the'movable arm 46 of switch 36moving the arm 46 to circuitclosing position. When this'occurs a circuitis now completed through the switch 36 for again energizing the coil ofrelay 52. Energization of relay52closes its normally open'contacts 52a,521),520 and 52d and opens its normally closed contact 52e.- .Theopening of the latter contact breaks the holding circuit for relay 56deenergi'zingthe latter sothat. its contacts 55a, 56b, 56c and 56emoveto open positions while its contact 56d move's'to circuit closingposition. 1 Closing of the contact 56d again provides a holding circuitfor the relay '52 through the now closed contacts 52d and 56d. Openingof the contacts 560., 55b'and 56c deenergizesthe 'motor 29terminatingthe' rotation of the latter v and 'the movement of the arms23, 24in the re v'erse directionwhlle the substantially simultaneousclosing of the-contacts 52a, 52b and 520 againenergizes the motor forrotation inthe first 'direction. v V

- The motor 29 is, therefore, repeatedly alternately energized forrotation in reverse directions for effecting rocking of the arms'23, 24'through" I an arc of predetermined extent; the size of-=this are beingdetermined by the-adjustment oi the actuator 3! and/or adjustments ofthemounting brackets 4|, 42 of the switches 35, 36.-i When the operatordesires to stop rocking of the arms he-simply depresses the'stopbutton69 thereby deenergizing relay (4 and opening its contacts 14a and 7417.Operation of the apparatus may be again initiated by momentaryactuationof: the start button H I In addition to the above describedfeatures,- the apparatus shown includes spaced abutments or' members 89and 90 in the bottom of the tank In" and extending lengthwise .thereof,which mom bersengage and support the coil or coils C in their lowermostposition. Theabutment 89 ishigher than the abutment 9!! and the inneredges of the abutments are disposed at opposite sides of the verticaldiameter of the coil or coils being treated, the upper inner edge of theabutment preferably being beveled as shown. It will also be ob servedthat the lengths of arms 23, 24 is less than one-half the Width of thetank lflso that'the vertical diameter of the 'coil 0r-coils C supportedtherein isat one side of the longitudinal center line of the tank. 7 i

The construction is such that when the' (ions C are supported upon thehook 26an'd the arms 23, 24 are in their uppermost positions, as shown-7: otter; az-slisht movement jtheiouter 'convolutionsoftthescoilsorgcoils; engage the; beveled .surfaceof.

abutment: 8.8., Since; this beveled surface. of theiabutment 89 i posedto. oneflsidei of. the vertiealgdiameter. of thehcoil or coils, further.downward. movement of, the arms 23,. 2.4 causes. .oonvolutions-ot the:coil.v or coils. to. rotate. relative. to. this abutmentand. to the,book; 25. the: support. affordedby the, latter. is Dmgressively removed;during the. downward milement. of; the; arms, and; the. weight: of. the

ooihor. coils-is transferred to, the abutments. 89. I

anckfim Imthein-lowermost.positionsthe coilsrest womthe abutments 89, 00and are. entirelyor. primarily. supported thereby. The nature andarrangement of, the. abutmentsis; such. that the wei htpt the coil or;coils; has caused them to. mtatea slightly relative: to. the, hook 26and/or causedzrelative circumferential. displacement of;theeconvolutions with respect toeachother. In additiorn. the-upper;portions or the. convolutions: oLtlie coil arenow radially spaced whilethelower. portion of; th .convolutions; are insubstantial n agement. V 7

.The extent .of. the. relative circumferential dis-- placement of theconvolutions of j the coils :and/or. the bodily-rotation of-thercoilmaybe any. desired amount depending upon the shape and spacing of;theprojections 89; Stand the extentof rockingzmovementrimparted tothearmslii, 24. That. isgto say, aiter the-,coillor. coils haveengagedthe. ahutments; 89; 90' andthe hook 26 is still-par tially su porting,the coils the convolutions thereof will heve beenq circumferentially dislaced with respect. to -.ea.chP other but the coilor. coils. have notesyet bodilyjrotatedwith respectto the hook. Its-:the-.rotation-.ofv thearms 23. and; 24 continue and the hook 26 moves further downwardly andout enga ement, with the; upper-portion of the innenoonvolution ofthescoilorcoils C, thisrelafl e circumferential displacement -oftheconvolutions. oithe, coilor coils will be. relieved and=the coil or.coils will:rest upon the abutmentsinposition'swvhich are; rotated andeccentricwithrespect toathe position which theyoccupied whensupported-by the hook. On the other. hand; the-parts may be; sopositioned and the extent of angular: rockingeofi the: arms 23; be soadjusted-that the.- coils; Cv are-martially' supported, by the hook 26'even inthe-lowermost position of the: arms 23,124

so that while there will be circumferentialdis! placement of 'theconvolutionsof the coil there wili-belittle if; any bodily rotationofthe coil. Therparticular mode ofoperation is selected; in

aceordance withqthenature of the material being.

treated and'theoondition of that material. Consequently; where theexpression partialrotation ot-the. coil is employed in the appendedclaims, it-is to beunderstood as including either bodily rotation of'thecoil or relative circumferential displacement of. theconvolution; ofthecoil, or. both.v I a when the-hook now-moves upwardly againby therocking-ofthe arms 23, 24 in the reversedi motion the radial spacingbetweenthe convolue tionsofthe coi'ls is again changed and thecoil is.lifted slightly above the abutments'89, 90; Since thehoolc 264s disposed.eccentrically with respect to the coil or coils-C'when the latter arein their lowermost position, this lifting of coils also' protimes afurther partial rotation thereof. This varying of the radial spacing-ofthe .convolutions of the coil togetherwith the-relative. circumferen--flail-displacement between the convolutions-and/or partial rotation. ofthe coiljis 'continuouslyre:

peatedsodong asathearmsfl: and. .arerocked. Therrelative-movementzot.the convolutions 01 the coils; effectively. ioosens'scale orotherforeign sub! stances thereon-and :facilitates thepenetration or.the :pickling solution therebetween. while .the; re, peated.partial+bodily rotation. of the coil .causes the loosened scale .ortheliketo-bedisplaoedfrom within theconvolutions.

After. the; coilv or coilshavebeen. sufflciently treated the motor 29.isstopped and a. lifting. meansgapplied. .tothe loopsll, of. the bar.and the latter, together. with coil .orcoils .6 sus-.- pended thereon;bodilyrliftedand ,movedtoamy,- desired-point such as.-a rinsing tank:or. thelika Alternatively; ,thecoilsmay beremovedfrom the hook. prior tosubsequent operations, thereom After theepreviouslytreated. coilshaveibeenxea movedfrom: the. hook-.26;- other coils to be. treated maybesubstituted :therefor by -inserting the-hook iatherethrough. Thebar. 25is. thempositioned above thesemiecircular recesses. in thearms 23. 2|and,lower ed .until, it rests uponthe arms 23, 2.4. Thereafter, thelifting means Jsdisconnected. or. sufiicientslack introduced therein,and the. motor. 29-started.v

It. is. believed. that. the.- invention. will now. be clearly. apparent.from the above description; of the present preferredembodiment.

Variations, however, may beeffectedin-the dine closed apparatus. Forexample,,the rocking of. the, arms-23 and 2l-need.not.be,elfectedbyrempioying areversibleselectric motor together. with thecircirithereinillustrated. and describedbut maybe .efiectedrby. aunidirectionalpower. means. connected with .theshaft I! by. asuitable=eccen, tric. or.- crank-arm.

The abutments Bland. may alsoebevaried from thoseshown .in .the.drawing, Thev opera tionisnotchangedif theabutment .90 behisher. thanthe abutment 89 nor, in fact, isitnecessary that .these abutments be. of.diflerent heights since theymay be of the. samev height but disposedwith their inner edges at difierent distances fromthe vertical diameter.of thecoilsto be treated.- Moreover, the. circumferential displacement.-of.v the.- convolutionsoithe coils. and/or. partial rotation. ofthecoils maybe. eifectedby surfaces. other. than the; substantiallyrectangular: abutments 111,-- lustrated, as'for. example; by'employingirregular. surfaces. of other configurations; which may be. supported.either. on-..the bottom; of the; tanker: spacemtherefrom. In.addition'.thehook-ZB. be replaced by other types of supporting mean-- bers.

These and. other modificationsz whichv be; effected by those skilled inthe art areconsidered; as comprehendedwithin this invention. and;hencothe-latter-is ;to be considered as limitedonly as required by=thespiritzandscope: of theappenrled claims.

Having thus described: my. invention; I claim? 1; An apparatus. forpickling loosely. coiled metallic stripmaterialcomprisinga .tanleadaptedto contain .a picklingvsolutiom a pair of spaced abutments. in; thebottom of said tank and sup-- ported therein; .a supporting memberadapted" to engageathez inner: convolution :of a. coil of the materialto be treated within said tank; and'means to: repeatedly raise; and'lower said; supporting member; within .said t'ank: soithat the. weightof the coil is alternately zsupported'bysaid support-- ing :member: andby said spaced .abutments; said? abutments being; of such-sizeand so:spacecixthat the .coil engages. the onerof said abntments in ail-.-vancezof: the:- other during. the descentor: the

coil within the tank thereby efiecting partial rotation of the coil, andthe said means for raising and lowering the supporting member includingadjustable means settable to control the extent of movement of saidsupporting member relative to the said abutments.

2. An apparatus for pickling loosely coiled metallic strip materialcomprising a tank adapted to contain a pickling solution, supportingmeans adapted to engage the inner convolution of a coil to be pickledand support the coil suspended in said solution, a pair of spacedabutments in and supported by said tank for engaging and supporting theouter convolution of said coil, and means for raising and lowering saidsupporting means so that the weight of said coil is alternatelysupported by and relieved from said supporting means and said abutmentsthereby radially moving the inner convolutions of the coil relative tothe outer convolutions, the spacing of said abutments being such thatthe coil engages one of the abutments to one side of the verticaldiameter of the coil in advance of its engagement with the other of saidabutments so that the weight of the coil effects a partial rotationthereof between each alternate raising and lowering of said supportingmeans, and the said means for raising and lowering the supporting meansincluding a reversible power means, adjustable means responsive to theextent of movement of said supporting means in either direction foreffecting reversal of said power means, the said adjustable means beingsettable to provide different extents of movement of said supportingmeans relative to said abutments.

3. An apparatus for pickling loosely coiled metallic strip materialcomprising an elongated tank adapted to contain a pickling solution, a

pair of spaced abutments in the bottom of said tank and supportedthereby, a supporting member adapted to engage the inner convolution of10 a coil of material to be treated, a shaft extending longitudinallyalong one side of said tank, a plurality of arms connected to said shaftand projecting inwardly of said tank so as to overhang said tank, meansfor connecting said supporting member to said arms, and means foroscillatin or rocking said shaft whereby the projecting ends of saidarms overhanging said tank and in turn said supporting member arerepeatedly raised and lowered so that the weight of the coil isalternately carried by said supporting member and by said spacedabutments, said abutments being of such size and so spaced that the coilengages one of said abutments in advance of the other during its descentwithin the tank thereby effecting partial rotation of the coil, and thesaid means for oscillating said shaft including a reversible electricmotor connected to the shaft, electrical switch means connected withsaid motor to sequentially effect rotation thereof alternately inopposite directions, and adjustable means movable in timed relationshipwith the said supportting member engageable with said switch means foralternate actuation thereof. the said adjustable means being settable toprovide diiferent extents of movement of said supporting member betweenactuations of the said switch means thereby controlling the extent ofmovement of the said member relative to the said abutments.

CHARLES G. WATSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,520,676 Koppin Dec. 23, 19241,734,986 Williams Nov. 12, 1929 2,122,913 Manion July 5, 1938 2,176,900Greer Oct. 24, 1939

